Image uploader script (#2164)

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Closes #2132

### What

Adds `just upload <image>`, which uploads the image to google cloud
using `gsutil`. The resulting URL contains the content hash plus the
original file name, which ensures that it is unique.

```
$ just upload image.png
https://static.rerun.io/dd31922030a6bf7223d5e3728d8da5407f4d6b1a_image.png
```

The script itself contains instructions for how to setup `gsutil`. It's
really just a link to Google's tutorial. Eventually it will be
documented separately together with the rest of the new workflow.

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [ ] I've included a screenshot or gif (if applicable)

<!-- This line will get updated when the PR build summary job finishes.
-->
PR Build Summary: https://build.rerun.io/pr/2164

---------

Co-authored-by: Emil Ernerfeldt <[email protected]>

Author: jprochazk

justfile

@@ -27,8 +27,7 @@ py-dev-env:
     set -euxo pipefail
     python3 -m venv venv
     venv/bin/pip install --upgrade pip
-    venv/bin/pip install -r rerun_py/requirements-build.txt
-    venv/bin/pip install -r rerun_py/requirements-lint.txt
+    venv/bin/pip install -r scripts/requirements-dev.txt
     echo "Do 'source venv/bin/activate' to use the virtual environment!"
 
 # Run all examples with the specified args
@@ -139,3 +138,6 @@ download-design-tokens:
 # Update the results of `insta` snapshot regression tests
 update-insta-tests:
     cargo test; cargo insta review
+
+upload *ARGS:
+    python3 "scripts/upload_image.py" {{ARGS}}

scripts/requirements-dev.txt

@@ -0,0 +1,7 @@
+# Pip packages all developers need
+
+-r ../rerun_py/requirements-build.txt
+-r ../rerun_py/requirements-doc.txt
+-r ../rerun_py/requirements-lint.txt
+
+google-cloud-storage==2.9.0 # for scripts/upload_image.py

scripts/upload_image.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+"""
+Upload an image to Google Cloud.
+
+Requires the following packages:
+  pip install google-cloud-storage # NOLINT
+
+Before running, you have to authenticate via the Google Cloud CLI:
+- Install it (https://cloud.google.com/storage/docs/gsutil_install)
+- Set up credentials (https://cloud.google.com/storage/docs/gsutil_install#authenticate)
+"""
+
+import argparse
+import hashlib
+import mimetypes
+import os
+
+from google.cloud import storage
+
+
+def content_hash(path: str) -> str:
+    h = hashlib.sha1()
+    b = bytearray(128 * 1024)
+    mv = memoryview(b)
+    with open(path, "rb", buffering=0) as f:
+        while n := f.readinto(mv):
+            h.update(mv[:n])
+    return h.hexdigest()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Upload an image.")
+    parser.add_argument("path", type=str, help="Path to the image.")
+    args = parser.parse_args()
+
+    hash = content_hash(args.path)
+    object_name = f"{hash}_{os.path.basename(args.path)}"
+
+    gcs = storage.Client()
+    bucket = gcs.bucket("rerun-static-img")
+    destination = bucket.blob(object_name)
+    destination.content_type, destination.content_encoding = mimetypes.guess_type(args.path)
+    with open(args.path, "rb") as f:
+        destination.upload_from_file(f)
+
+    print(f"https://static.rerun.io/{object_name}")
+
+
+if __name__ == "__main__":
+    main()